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Features

Improved Screw and Stud Machinery

Treatment of Animal Refuse in Europe

Science Familiarly Illustrated

Editorial Summary

Application of the Lever Escapement

By Jules D. Huguenin Vuillemin

Recent American and Foreign Patents

Answers to Correspondents

Extension Notices

New Publications

Hutton and Mee's Improved Blind Rod

Swift's Sash-Weight Attachment

The Value of Mechanical Skill in the Arts

Caution

A Word About Almanacs

The Teredo, or Ship Worm--Important Trial

Patent Claims

Gravel and Cement Mining

Scientific American

Increased Force in the Patent Office

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April 06, 1867

Help Us Reforest the Mississippi River Valley